We follow the way that goes leftwards and we start climbing. When we got on the ample crest from where going on we get to the south tail of the Ponor green. We climb down to a stream (Ursului Stream) from where we follow on a drive and we arrive to a water-blast. This is the Cold spring (Izvorul Rece). We climb on the right side of the stream upwards 10-15 minutes and we get to a plateau. Here is the Lumea Pierduta (The Lost World)! Following the blaze we go on climbing on a drive.

A light slope up takes us to a huge gaping hole. This is the Twin vertical cave, Avenul Gemanata. Its diameter is of 20m, its depth of 100m and straight is starts with a vertical shaft of 40 m. 15 minutes far from here is the Black vertical cave (Avenul Negru). In the year of its discovery in 1956 with its shaft of 108 m it was one of the deepest underground falls into river shafts.

At that time there was still existed the inferior connection with the Twin Vertical Cave and the aggregate length of the two vertical caves was of 2437 m. During the lumbering the trunks had rolled in the shaft stopping out the inferior duct and it also reduced the depth to 90 m.

Circa 10 minutes we reach the Pionierilor vertical cave, from where we descend to the Acoperit vertical cave, and after ten more minutes we get to a clearing. After this we go back to the Izvorul Rece and then back to the Padis lodge.